This is the best video to learn about the do's and donts during a job interview.

1)Do your comprehensive research regarding the type of job interview.
2)Do practice for the interview but don't try to memorize your answers.
3)Do plan to reach at the company about 15 minutes early. Late arrival for a job interview shows your attitude non serious.
4)Do bring some extra copies of CV.
5)Do shake hand firmly and tightly.

1) Dont use slang and poor language.
2) Dont use words such as 'UH', 'UM', 'LIKE', etc
3) Dont be over aggressive.
4) Dont ask about salary first.
5) Dont try to be over-smart by over answering questions.
6) Dont answer cell phone calls during job interview.